Welcome to Fantastic Rome! Keep your hands and arms inside the chariot at all times, and don't feed the gladiators.
This tends to work without a trigger word, but add fantrome if you want to be sure it sticks to the theme. Add roman city for buildings without pillars in them. Add roman pillars for buildings with pillars. Add roman ruins to show the buildings in ruins. Add bath house to show big pools of water in an ancient and less sanitary version of swimming pools. Add roman soldier to show... well... a roman soldier. I also added a tiny number of images for chariots, but those were all paintings and I'm not even convinced they're roman, so your luck with using the chariot trigger may be quite low. I also have several pictures that depict something similar to a colosseum so use that keyword if you want something sort-of Colosseum looking, though it often looks weird and dominates the whole image. Note the spelling, since I intentionally did not use the word "coliseum" when tagging... just "colosseum".
I used a large dataset of ancient-rome adjacent things (sometimes more greek than roman, and sometimes fairly modern in the case of bath house but it works). I did not include any images of gladiators. Sorry, but I felt like gladiators deserved a well made lora of its own. I'm sure someone has a lora of buff gladiator looking dudes uploaded to civitai somewhere! :)
